AWS Template Not Accepting Versions numbers for products

[abuehrle]

I ran this template here:

https://github.com/weaveworks/guides/blob/master/weave-multicast/weave-multicast.md

I tried both 1.2.0 or 1.2 for Weave Scope .

and also 1.9.0 and 1.9 for Weave Net.

Unfortunately that doesn't work either -- still loads the prior versions.